function STRdatos(stform,sturl,stvar,stid,sttipo){
if(sturl == ''){sturl = 'http://www.salvatruchos.com/stsystem/stclass/stajax.php';}STRequestEnviar = STRequest();STRequestEnviar.open(stform, sturl, true);STRequestEnviar.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');STRequestEnviar.onreadystatechange=function(){ if(STRequestEnviar.readyState==1){}if (STRequestEnviar.readyState == 4 && STRequestEnviar.status == 200){switch(sttipo){case 1:case 3:STRespuesta = STRequestEnviar.responseXML;break;case 2:STRespuesta = STRequestEnviar.responseText;break;default: STRespuesta = STRequestEnviar.responseText;}document.getElementById(stid).innerHTML=STRespuesta;}} 
STRequestEnviar.send(stvar);}function STRequest(){var sthttp=false;try{sthttp=new ActiveXObject("Msxml2.XMLHTTP");}catch(e){try{sthttp=new ActiveXObject("Microsoft.XMLHTTP");}catch(E){sthttp=false;}}if(!sthttp && typeof XMLHttpRequest!='undefined'){sthttp=new XMLHttpRequest();}return sthttp; 
}/*FIN XMLH REQUEST*/